Wednesday, 13 December 2017

CELL , CELL THEORY

                             CELL AND CELL THEORY

Cell is the basic unit of life. It is the fundamental structural and functional unit of an organism.

CELL THEORY- in 1838 and 1839 Schleiden and Schwan formulated cell theory and state that:-
I) cell is the basic unit of the life.
II) all the living things are composed of cells and cell products.

Later Rudolf Virchow in 1855 first explained that cells divided and new cells are formed from preexisting cells (omnis cellula ecellula) .

cells are of three types:-

1) prokaryotic cell
2) mesokaryotic cell
3) Eukaryotic cell

Tomorrow we will talk about the three types of cells. 

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